A variety of techniques were applied to wool follicles stored in William's E culture medium to optimise the extraction of keratin and keratin associated proteins (KAPs). A time course study indicated that the maximum storage time for live skin in this buffer at 20 °C was 24 h, after which degradative loss of protein became significant. Maceration of the skin for 10 min followed by reciprocal action shaking for 14 h had a detrimental effect on keratin extractability. The best approach involved using a Dounce homogeniser as this resulted in the highest amount of Type I and II keratins and KAPs.
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